Question

Which of these numbers exactly divide by nine? 116 713 495 640 or 360

Answer 1

I assume the question means that it is nine divides it:
116/9 = 12 8/9
713/9 = 79 2/9
495/9 = 55
640/9 = 71 1/9
360/9 = 40
An easier way to do it would be adding all the digits and see if that divides nine:
1+1+6 = 8, not
7+1+3 = 11, not
4+9+5 = 18, yes
...
I will explain why it works if you are interested.

Answer 2

116/9 = 12.88
713/9 = 79.22
495/9 = 55
640/9 = 71.11
360/9 = 40
it would be 495 and 360